The primary source gives the direct information from the research. Secondary source gives the second hand information.
Step-by-step explanation:
The primary literature is used to review articles and books, whereas secondary literature has no abstract and data images are taken from other sources.
Scrapbooks, journals, letters, archives, speeches, published books, government publications are some examples of primary source.
Bibliographies, biograhical works, reference books, articles from magazines, journals are examples of secondary source.